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Theorem dchrisum0fmul 20657
Description: The function  F, the divisor sum of a Dirichlet character, is a multiplicative function (but not completely multiplicative). Equation 9.4.27 of [Shapiro], p. 382. (Contributed by Mario Carneiro, 5-May-2016.)
Hypotheses
Ref Expression
rpvmasum.z  |-  Z  =  (ℤ/n `  N )
rpvmasum.l  |-  L  =  ( ZRHom `  Z
)
rpvmasum.a  |-  ( ph  ->  N  e.  NN )
rpvmasum2.g  |-  G  =  (DChr `  N )
rpvmasum2.d  |-  D  =  ( Base `  G
)
rpvmasum2.1  |-  .1.  =  ( 0g `  G )
dchrisum0f.f  |-  F  =  ( b  e.  NN  |->  sum_ v  e.  { q  e.  NN  |  q 
||  b }  ( X `  ( L `  v ) ) )
dchrisum0f.x  |-  ( ph  ->  X  e.  D )
dchrisum0fmul.a  |-  ( ph  ->  A  e.  NN )
dchrisum0fmul.b  |-  ( ph  ->  B  e.  NN )
dchrisum0fmul.m  |-  ( ph  ->  ( A  gcd  B
)  =  1 )
Assertion
Ref Expression
dchrisum0fmul  |-  ( ph  ->  ( F `  ( A  x.  B )
)  =  ( ( F `  A )  x.  ( F `  B ) ) )
Distinct variable groups:    q, b,
v, A    N, q    B, b, q, v    L, b, v    X, b, v
Allowed substitution hints:    ph( v, q, b)    D( v, q, b)    .1. ( v, q, b)    F( v, q, b)    G( v, q, b)    L( q)    N( v, b)    X( q)    Z( v, q, b)

Proof of Theorem dchrisum0fmul
Dummy variables  k 
i  j are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 dchrisum0fmul.a . . 3  |-  ( ph  ->  A  e.  NN )
2 dchrisum0fmul.b . . 3  |-  ( ph  ->  B  e.  NN )
3 dchrisum0fmul.m . . 3  |-  ( ph  ->  ( A  gcd  B
)  =  1 )
4 eqid 2285 . . 3  |-  { q  e.  NN  |  q 
||  A }  =  { q  e.  NN  |  q  ||  A }
5 eqid 2285 . . 3  |-  { q  e.  NN  |  q 
||  B }  =  { q  e.  NN  |  q  ||  B }
6 eqid 2285 . . 3  |-  { q  e.  NN  |  q 
||  ( A  x.  B ) }  =  { q  e.  NN  |  q  ||  ( A  x.  B ) }
7 rpvmasum2.g . . . 4  |-  G  =  (DChr `  N )
8 rpvmasum.z . . . 4  |-  Z  =  (ℤ/n `  N )
9 rpvmasum2.d . . . 4  |-  D  =  ( Base `  G
)
10 rpvmasum.l . . . 4  |-  L  =  ( ZRHom `  Z
)
11 dchrisum0f.x . . . . 5  |-  ( ph  ->  X  e.  D )
1211adantr 451 . . . 4  |-  ( (
ph  /\  j  e.  { q  e.  NN  | 
q  ||  A }
)  ->  X  e.  D )
13 ssrab2 3260 . . . . . . 7  |-  { q  e.  NN  |  q 
||  A }  C_  NN
1413sseli 3178 . . . . . 6  |-  ( j  e.  { q  e.  NN  |  q  ||  A }  ->  j  e.  NN )
1514nnzd 10118 . . . . 5  |-  ( j  e.  { q  e.  NN  |  q  ||  A }  ->  j  e.  ZZ )
1615adantl 452 . . . 4  |-  ( (
ph  /\  j  e.  { q  e.  NN  | 
q  ||  A }
)  ->  j  e.  ZZ )
177, 8, 9, 10, 12, 16dchrzrhcl 20486 . . 3  |-  ( (
ph  /\  j  e.  { q  e.  NN  | 
q  ||  A }
)  ->  ( X `  ( L `  j
) )  e.  CC )
1811adantr 451 . . . 4  |-  ( (
ph  /\  k  e.  { q  e.  NN  | 
q  ||  B }
)  ->  X  e.  D )
19 ssrab2 3260 . . . . . . 7  |-  { q  e.  NN  |  q 
||  B }  C_  NN
2019sseli 3178 . . . . . 6  |-  ( k  e.  { q  e.  NN  |  q  ||  B }  ->  k  e.  NN )
2120nnzd 10118 . . . . 5  |-  ( k  e.  { q  e.  NN  |  q  ||  B }  ->  k  e.  ZZ )
2221adantl 452 . . . 4  |-  ( (
ph  /\  k  e.  { q  e.  NN  | 
q  ||  B }
)  ->  k  e.  ZZ )
237, 8, 9, 10, 18, 22dchrzrhcl 20486 . . 3  |-  ( (
ph  /\  k  e.  { q  e.  NN  | 
q  ||  B }
)  ->  ( X `  ( L `  k
) )  e.  CC )
2415, 21anim12i 549 . . . 4  |-  ( ( j  e.  { q  e.  NN  |  q 
||  A }  /\  k  e.  { q  e.  NN  |  q  ||  B } )  ->  (
j  e.  ZZ  /\  k  e.  ZZ )
)
2511adantr 451 . . . . . 6  |-  ( (
ph  /\  ( j  e.  ZZ  /\  k  e.  ZZ ) )  ->  X  e.  D )
26 simprl 732 . . . . . 6  |-  ( (
ph  /\  ( j  e.  ZZ  /\  k  e.  ZZ ) )  -> 
j  e.  ZZ )
27 simprr 733 . . . . . 6  |-  ( (
ph  /\  ( j  e.  ZZ  /\  k  e.  ZZ ) )  -> 
k  e.  ZZ )
287, 8, 9, 10, 25, 26, 27dchrzrhmul 20487 . . . . 5  |-  ( (
ph  /\  ( j  e.  ZZ  /\  k  e.  ZZ ) )  -> 
( X `  ( L `  ( j  x.  k ) ) )  =  ( ( X `
 ( L `  j ) )  x.  ( X `  ( L `  k )
) ) )
2928eqcomd 2290 . . . 4  |-  ( (
ph  /\  ( j  e.  ZZ  /\  k  e.  ZZ ) )  -> 
( ( X `  ( L `  j ) )  x.  ( X `
 ( L `  k ) ) )  =  ( X `  ( L `  ( j  x.  k ) ) ) )
3024, 29sylan2 460 . . 3  |-  ( (
ph  /\  ( j  e.  { q  e.  NN  |  q  ||  A }  /\  k  e.  { q  e.  NN  |  q 
||  B } ) )  ->  ( ( X `  ( L `  j ) )  x.  ( X `  ( L `  k )
) )  =  ( X `  ( L `
 ( j  x.  k ) ) ) )
31 fveq2 5527 . . . 4  |-  ( i  =  ( j  x.  k )  ->  ( L `  i )  =  ( L `  ( j  x.  k
) ) )
3231fveq2d 5531 . . 3  |-  ( i  =  ( j  x.  k )  ->  ( X `  ( L `  i ) )  =  ( X `  ( L `  ( j  x.  k ) ) ) )
331, 2, 3, 4, 5, 6, 17, 23, 30, 32fsumdvdsmul 20437 . 2  |-  ( ph  ->  ( sum_ j  e.  {
q  e.  NN  | 
q  ||  A } 
( X `  ( L `  j )
)  x.  sum_ k  e.  { q  e.  NN  |  q  ||  B } 
( X `  ( L `  k )
) )  =  sum_ i  e.  { q  e.  NN  |  q  ||  ( A  x.  B
) }  ( X `
 ( L `  i ) ) )
34 rpvmasum.a . . . . 5  |-  ( ph  ->  N  e.  NN )
35 rpvmasum2.1 . . . . 5  |-  .1.  =  ( 0g `  G )
36 dchrisum0f.f . . . . 5  |-  F  =  ( b  e.  NN  |->  sum_ v  e.  { q  e.  NN  |  q 
||  b }  ( X `  ( L `  v ) ) )
378, 10, 34, 7, 9, 35, 36dchrisum0fval 20656 . . . 4  |-  ( A  e.  NN  ->  ( F `  A )  =  sum_ j  e.  {
q  e.  NN  | 
q  ||  A } 
( X `  ( L `  j )
) )
381, 37syl 15 . . 3  |-  ( ph  ->  ( F `  A
)  =  sum_ j  e.  { q  e.  NN  |  q  ||  A } 
( X `  ( L `  j )
) )
398, 10, 34, 7, 9, 35, 36dchrisum0fval 20656 . . . 4  |-  ( B  e.  NN  ->  ( F `  B )  =  sum_ k  e.  {
q  e.  NN  | 
q  ||  B } 
( X `  ( L `  k )
) )
402, 39syl 15 . . 3  |-  ( ph  ->  ( F `  B
)  =  sum_ k  e.  { q  e.  NN  |  q  ||  B } 
( X `  ( L `  k )
) )
4138, 40oveq12d 5878 . 2  |-  ( ph  ->  ( ( F `  A )  x.  ( F `  B )
)  =  ( sum_ j  e.  { q  e.  NN  |  q  ||  A }  ( X `  ( L `  j
) )  x.  sum_ k  e.  { q  e.  NN  |  q  ||  B }  ( X `  ( L `  k
) ) ) )
421, 2nnmulcld 9795 . . 3  |-  ( ph  ->  ( A  x.  B
)  e.  NN )
438, 10, 34, 7, 9, 35, 36dchrisum0fval 20656 . . 3  |-  ( ( A  x.  B )  e.  NN  ->  ( F `  ( A  x.  B ) )  = 
sum_ i  e.  {
q  e.  NN  | 
q  ||  ( A  x.  B ) }  ( X `  ( L `  i ) ) )
4442, 43syl 15 . 2  |-  ( ph  ->  ( F `  ( A  x.  B )
)  =  sum_ i  e.  { q  e.  NN  |  q  ||  ( A  x.  B ) }  ( X `  ( L `  i )
) )
4533, 41, 443eqtr4rd 2328 1  |-  ( ph  ->  ( F `  ( A  x.  B )
)  =  ( ( F `  A )  x.  ( F `  B ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 358    = wceq 1625    e. wcel 1686   {crab 2549   class class class wbr 4025    e. cmpt 4079   ` cfv 5257  (class class class)co 5860   1c1 8740    x. cmul 8744   NNcn 9748   ZZcz 10026   sum_csu 12160    || cdivides 12533    gcd cgcd 12687   Basecbs 13150   0gc0g 13402   ZRHomczrh 16453  ℤ/nczn 16456  DChrcdchr 20473
This theorem is referenced by:  dchrisum0flblem2  20660
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1535  ax-5 1546  ax-17 1605  ax-9 1637  ax-8 1645  ax-13 1688  ax-14 1690  ax-6 1705  ax-7 1710  ax-11 1717  ax-12 1868  ax-ext 2266  ax-rep 4133  ax-sep 4143  ax-nul 4151  ax-pow 4190  ax-pr 4216  ax-un 4514  ax-inf2 7344  ax-cnex 8795  ax-resscn 8796  ax-1cn 8797  ax-icn 8798  ax-addcl 8799  ax-addrcl 8800  ax-mulcl 8801  ax-mulrcl 8802  ax-mulcom 8803  ax-addass 8804  ax-mulass 8805  ax-distr 8806  ax-i2m1 8807  ax-1ne0 8808  ax-1rid 8809  ax-rnegex 8810  ax-rrecex 8811  ax-cnre 8812  ax-pre-lttri 8813  ax-pre-lttrn 8814  ax-pre-ltadd 8815  ax-pre-mulgt0 8816  ax-pre-sup 8817  ax-addf 8818  ax-mulf 8819
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1531  df-nf 1534  df-sb 1632  df-eu 2149  df-mo 2150  df-clab 2272  df-cleq 2278  df-clel 2281  df-nfc 2410  df-ne 2450  df-nel 2451  df-ral 2550  df-rex 2551  df-reu 2552  df-rmo 2553  df-rab 2554  df-v 2792  df-sbc 2994  df-csb 3084  df-dif 3157  df-un 3159  df-in 3161  df-ss 3168  df-pss 3170  df-nul 3458  df-if 3568  df-pw 3629  df-sn 3648  df-pr 3649  df-tp 3650  df-op 3651  df-uni 3830  df-int 3865  df-iun 3909  df-br 4026  df-opab 4080  df-mpt 4081  df-tr 4116  df-eprel 4307  df-id 4311  df-po 4316  df-so 4317  df-fr 4354  df-se 4355  df-we 4356  df-ord 4397  df-on 4398  df-lim 4399  df-suc 4400  df-om 4659  df-xp 4697  df-rel 4698  df-cnv 4699  df-co 4700  df-dm 4701  df-rn 4702  df-res 4703  df-ima 4704  df-iota 5221  df-fun 5259  df-fn 5260  df-f 5261  df-f1 5262  df-fo 5263  df-f1o 5264  df-fv 5265  df-isom 5266  df-ov 5863  df-oprab 5864  df-mpt2 5865  df-1st 6124  df-2nd 6125  df-tpos 6236  df-riota 6306  df-recs 6390  df-rdg 6425  df-1o 6481  df-oadd 6485  df-er 6662  df-ec 6664  df-qs 6668  df-map 6776  df-en 6866  df-dom 6867  df-sdom 6868  df-fin 6869  df-sup 7196  df-oi 7227  df-card 7574  df-pnf 8871  df-mnf 8872  df-xr 8873  df-ltxr 8874  df-le 8875  df-sub 9041  df-neg 9042  df-div 9426  df-nn 9749  df-2 9806  df-3 9807  df-4 9808  df-5 9809  df-6 9810  df-7 9811  df-8 9812  df-9 9813  df-10 9814  df-n0 9968  df-z 10027  df-dec 10127  df-uz 10233  df-rp 10357  df-fz 10785  df-fzo 10873  df-fl 10927  df-mod 10976  df-seq 11049  df-exp 11107  df-hash 11340  df-cj 11586  df-re 11587  df-im 11588  df-sqr 11722  df-abs 11723  df-clim 11964  df-sum 12161  df-dvds 12534  df-gcd 12688  df-struct 13152  df-ndx 13153  df-slot 13154  df-base 13155  df-sets 13156  df-ress 13157  df-plusg 13223  df-mulr 13224  df-starv 13225  df-sca 13226  df-vsca 13227  df-tset 13229  df-ple 13230  df-ds 13232  df-0g 13406  df-imas 13413  df-divs 13414  df-mnd 14369  df-mhm 14417  df-grp 14491  df-minusg 14492  df-sbg 14493  df-mulg 14494  df-subg 14620  df-nsg 14621  df-eqg 14622  df-ghm 14683  df-cmn 15093  df-abl 15094  df-mgp 15328  df-rng 15342  df-cring 15343  df-ur 15344  df-oppr 15407  df-dvdsr 15425  df-unit 15426  df-rnghom 15498  df-subrg 15545  df-lmod 15631  df-lss 15692  df-lsp 15731  df-sra 15927  df-rgmod 15928  df-lidl 15929  df-rsp 15930  df-2idl 15986  df-cnfld 16380  df-zrh 16457  df-zn 16460  df-dchr 20474
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